1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2eb223353f2d77054d08a1068377e1dcdb45d8ef432ca0c04091a76d507d7ed. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebf25685-fca3-4137-9724-f0493c1070c1.json and https://artists.proofprofile.net/proofs/artist/ebf25685-fca3-4137-9724-f0493c1070c1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c6a5822dffab2be9cab70b07f8035025d729bdf2bafd1690062b1788969875. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC571502663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843f032bf33e56d701e64f43985cf10309bff83e89cb555b0263c35977120b38. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC571502666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9203ddc5b70f599df5ab6f73a337bcb9eb48fad366acf039b86a381f61aa1f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC571502667.
Diccionario Básico Ilustrado (Doméstico B-Sides)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50b9e71893f698df1afbf2b78ce4399e521c43eb45962526446a73149ccc7a1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC571502689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183f817a0d8e6efc178f944083b20a0ed5f0f06de42fa452d6f67b2796dec43a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC571502693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4614ee0982bd4abf7afda8851266747ce2b66111a9ec0cc96cf6e06fb94c08a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5AB1806512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7385f47495fdc445d5d8ecf86a55b7980f58d12a57c15f0547dcb52d4d88ab. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5AB1806513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e65476043fe98485d13bd2938ed56ee1fb126f3f477172dd764ac82def08a1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR1RB2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe935ea25f2e365b1469fa5f0dcbaeec14a1823931f46263f5645805689d16b8e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR1RB2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed983e04e14781ed230d05df3a7b87153b63d8804d5db6237b9a397eeda547fd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR85B2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6693c70ccc094c74abb73f3417afb957deb8640967f4f304f463d557bfcbdcbb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJY2466793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3857b6161be21996e12f7fe4ba3187b5413fa7e5d16d5f8f1fb049eb75e99a20. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2107325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d561e78723c0b1da08623458624b184369cf0473abab8822ad8264558ee9859. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR6B52200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d73387895367582ede4701ea0963386e7cbdeebbb762622599df35fc09372e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARBY12100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd984bae978ece121cc73601ba4c496ab6c40e25e8e180f180df758dd5965daa0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2145446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3be2c94a23b7b225de408da793a238fe799d358261a199167e9c678b807c1b0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR2642100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02b36792b19ca668be26041704998e01660d48ccb3242f0286a449e5b937d52. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARQ0D2400002.